Filed Pursuant to Rule 433
                                                    Registration No.: 333-132249


                       [Banc of America Securities Logo]

              -----------------------------------------------------

      The asset-backed securities referred to in these materials, and the asset
pools backing them, are subject to modification or revision (including the
possibility that one or more classes of securities may be split, combined or
eliminated at any time prior to issuance or availability of a final prospectus)
and are offered on a "when, as and if issued" basis. You understand that, when
you are considering the purchase of these securities, a contract of sale will
come into being no sooner than the date on which the relevant class has been
priced and we have confirmed the allocation of securities to be made to you; any
"indications of interest" expressed by you, and any "soft circles" generated by
us, will not create binding contractual obligations for you or us.

      Because the asset-backed securities are being offered on a "when, as and
if issued" basis, any contract of sale will terminate, by its terms, without any
further obligation or liability between us, if the securities themselves, or the
particular class to which the contract relates, are not issued. In addition,
since the asset-backed securities and the asset pools backing them are subject
to modification or revision (including the possibility that one or more classes
of securities may be split, combined or eliminated at any time prior to issuance
or availability of a final prospectus), any such contract also is conditioned
upon the understanding that no material change will occur with respect to the
relevant class of securities prior to the closing date. If a material change
does occur with respect to such class, our contract will terminate, by its
terms, without any further obligation or liability between us (the "Automatic
Termination"). If an Automatic Termination occurs, we will provide you with
revised offering materials reflecting the material change and give you an
opportunity to purchase such class. To indicate your interest in purchasing the
class, you must communicate to us your desire to do so within such timeframe as
may be designated in connection with your receipt of the revised offering
materials.


Mortgage Pass-Through Certificates, Series 2007-1


Banc of America Alternative Loan Trust 2007-1
Issuing Entity


Banc of America Mortgage Securities, Inc.
Depositor


Bank of America, National Association
Sponsor and Servicer


[Bank of America logo]



February 23, 2007


- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------


                                   DISCLAIMER
                                   ----------

This free writing prospectus is being delivered to you solely to provide you
with information about the offering of the securities referred to in this free
writing prospectus and to solicit an offer to purchase the securities, when, as
and if issued. Any such offer to purchase made by you will not be accepted and
will not constitute a contractual commitment by you to purchase any of the
securities until we have accepted your offer to purchase securities. You may
withdraw your offer to purchase securities at any time prior to our acceptance
of your offer.

The information in this free writing prospectus supersedes information contained
in any prior similar free writing prospectus relating to these securities prior
to the time of your commitment to purchase.

This free writing prospectus is not an offer to sell or solicitation of an offer
to buy these securities in any state where such offer, solicitation or sale is
not permitted.

                             IRS CIRCULAR 230 NOTICE

            THIS FREE WRITING PROSPECTUS IS NOT INTENDED OR WRITTEN TO BE USED,
            AND CANNOT BE USED, FOR THE PURPOSE OF AVOIDING U.S. FEDERAL, STATE
            OR LOCAL TAX PENALTIES. THIS FREE WRITING PROSPECTUS IS WRITTEN AND
            PROVIDED BY THE UNDERWRITER IN CONNECTION WITH THE PROMOTION OR
            MARKETING OF THE TRANSACTIONS OR MATTERS ADDRESSED HEREIN. INVESTORS
            SHOULD SEEK ADVICE BASED ON THEIR PARTICULAR CIRCUMSTANCES FROM AN
            INDEPENDENT TAX ADVISOR.

The information contained in this free writing prospectus should be read in
conjunction with the information contained in the Depositor's most recent base
prospectus and the information provided by Banc of America Securities LLC (the
"Underwriter"). The Depositor's most recent base prospectus referred to in this
free writing prospectus is the base prospectus dated December 27, 2006 attached
to the prospectus supplement dated December 27, 2006 relating to the Banc of
America Alternative Loan Trust 2006-9 Mortgage Pass-Through Certificates, Series
2006-9 filed with the SEC under Rule 424(b)(5) of the Securities Act (SEC File
No. 333-132249-11). You should carefully read this free writing prospectus and
the base prospectus, as well as the information provided by the Underwriter,
before you make any investment decision. Capitalized terms that are used but not
defined in this free writing prospectus have the meaning given to those terms in
the base prospectus.

ANY DISCLAIMERS OR OTHER NOTICES THAT MAY APPEAR BELOW THIS DOCUMENT ARE NOT
APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED. SUCH DISCLAIMERS OR
OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION
BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM.


- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

Transaction.................. Banc of America Alternative Loan Trust 2007-1
                              Mortgage Pass-Through Certificates, Series
                              2007-1

Issuing Entity............... Banc of America Alternative Loan Trust 2007-1

Depositor.................... Banc of America Mortgage Securities, Inc.

Underwriter.................. Banc of America Securities LLC

Sponsor and Servicer......... Bank of America, National Association

Trustee...................... Wells Fargo Bank, N.A.

Rating Agencies.............. At  least  two of  Standard  &  Poor's,  Moody's
                              and/or Fitch Ratings will rate the offered Senior
                              Certificates. At least one of the above Rating
                              Agencies will rate the offered Subordinate
                              Certificates.

Senior Certificates.......... The Senior Certificates will consist of two or
                              more classes of certificates, one of which will be
                              the residual certificate. Each group may also
                              contain a class of ratio strip certificates. One
                              or more classes of certificates may be comprised
                              of two or more components. The components of a
                              class are not severable. The Senior Certificates
                              (or in the case of a class of Senior Certificates
                              comprised of components, the components) may be
                              divided into two or more groups in which case each
                              group will have a corresponding group of
                              Subordinate Certificates which may or may not be
                              shared with one or more other groups of Senior
                              Certificates.

Senior Non-PO Certificates... The Senior Certificates (other than any Ratio
                              Strip Certificates or components thereof).

Subordinate Certificates..... If the Senior Certificates are divided into
                              multiple groups, the Subordinate Certificates may
                              or may not consist of multiple groups. If there is
                              only one group of Subordinate Certificates, the
                              Subordinate Certificates will support all of the
                              Senior Certificates. If there are multiple groups
                              of Subordinate Certificates, each group will
                              support one or more groups of Senior Certificates.
                              Each class of Subordinate Certificates is also
                              subordinated to those classes of Subordinate
                              Certificates within its group, if any, higher in
                              order of payment priority.

Offered Certificates......... Senior Certificates and Subordinate Certificates
                              rated BBB- or Baa3 or better

Expected Closing Date........ March 30, 2007


Banc of America Securities LLC                                                 3
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------
Expected Investor
Closing Date................. March 30, 2007

Distribution Date............ 25th of each month, or the next succeeding
                              business day (First Distribution Date: April 25,
                              2007)

Cut-off Date................. March 1, 2007

Determination Date........... For any Distribution Date, the 16th day of the
                              month in which the Distribution Date occurs or, if
                              that day is not a business day, the immediately
                              preceding business day.

Record Date.................. For any Distribution Date, the close of business
                              on the last business day of the month preceding
                              the month of that Distribution Date.

Day Count.................... 30/360

Exchangeable
Certificates and
Exchangeable REMIC
Certificates................. If indicated in the prospectus supplement, a class
                              or combination of classes of exchangeable REMIC
                              certificates may be exchangeable for certain class
                              or classes of exchangeable certificates in certain
                              combinations specified in the prospectus
                              supplement.

Clearing..................... DTC, Clearstream and Euroclear.

Denominations:



                                        Original                                                   Incremental
                                    Certificate Form            Minimum Denominations             Denominations
                                    ---------------------------------------------------------------------------
                                                                                           
Senior Certificates (other than        Book Entry                      $1,000                          $1
any Principal Only Certificates,
Interest Only Certificates and
Special Retail Certificates)

Interest Only Certificates             Book Entry               $1,000,000 (notional                $1 or N/A
                                                            amount) or size of class, if
                                                                less than $1,000,000

Special Retail Certificates            Book Entry                      $1,000                        $1,000

Principal Only Certificates and        Book Entry                      $25,000                         $1
Subordinate Certificates



Banc of America Securities LLC                                                 4
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------
SMMEA Eligibility............ The Senior Certificates and the most senior class
                              or classes of Subordinate Certificates are
                              expected to constitute "mortgage related
                              securities" for purposes of SMMEA.

ERISA Eligibility............ A fiduciary or other person acting on behalf of
                              any employee benefit plan or arrangement,
                              including an individual retirement account,
                              subject to the Employee Retirement Income Security
                              Act of 1974, as amended ("ERISA"), the Code or any
                              federal, state or local law ("Similar Law") which
                              is similar to ERISA or the Code (collectively, a
                              "Plan") should carefully review with its legal
                              advisors whether the purchase or holding of an
                              Offered Certificate could give rise to a
                              transaction prohibited or not otherwise
                              permissible under ERISA, the Code or Similar Law.

                              The U.S. Department of Labor has extended to Banc
                              of America Securities LLC an administrative
                              exemption (the "Exemption") from certain of the
                              prohibited transaction rules of ERISA and the
                              related excise tax provisions of Section 4975 of
                              the Code with respect to the initial purchase, the
                              holding and the subsequent resale by certain Plans
                              of certificates in pass-through trusts that
                              consist of certain receivables, loans and other
                              obligations that meet the conditions and
                              requirements of the Exemption.

                              The Exemption may cover the acquisition and
                              holding of the Senior Certificates (other than the
                              residual certificates) by the Plans to which it
                              applies provided that all conditions of the
                              Exemption other than those within the control of
                              the investors are met. In addition, as of the date
                              hereof, there is no single mortgagor that is the
                              obligor on 5% of the initial balance of the
                              Mortgage Pool.

                              If there are Mortgage Loans with loan-to-value
                              ratios in excess of 100% in the Mortgage Pool or
                              in a loan group within the Mortgage Pool, the
                              Exemption will not cover the acquisition and
                              holding of the related offered Super Senior
                              Support or Subordinate Certificates.

                              Prospective Plan investors should consult with
                              their legal advisors concerning the impact of
                              ERISA, the Code and Similar Law, the applicability
                              of PTE 83-1 and the Exemption, and the potential
                              consequences in their specific circumstances,
                              prior to making an investment in the Offered
                              Certificates. Moreover, each Plan fiduciary should
                              determine whether under the governing plan
                              instruments and the applicable fiduciary standards
                              of investment prudence and diversification, an
                              investment in the Offered Certificates is
                              appropriate for the Plan, taking into account the
                              overall investment policy of the Plan and the
                              composition of the Plan's investment portfolio.


Banc of America Securities LLC                                                 5
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

Tax Structure................ For federal income tax purposes, the Trust will
                              be treated as one or more "real estate  mortgage
                              investment conduits" (each, a "REMIC").

                              o  The Senior Certificates (other than the
                                 residual certificate and any exchangeable
                                 certificates) and the Subordinate Certificates
                                 will constitute "regular interests" in a REMIC
                                 and will be treated as newly-originated debt
                                 instruments for most federal income tax
                                 purposes.

                              o  Generally, for a class of component
                                 certificates, each component, rather than the
                                 class itself, will constitute a regular
                                 interest in a REMIC.

                              o  The residual certificate will represent the
                                 sole "residual interest" in each REMIC.

                              You must report income received on your Offered
                              Certificates as it accrues from Distribution Date
                              to Distribution Date, even if it is before such
                              income is distributed in cash to you.

                              Certain classes of Offered Certificates may be
                              issued with "original issue discount." If your
                              class of Offered Certificates is issued with
                              original issue discount, you must report original
                              issue discount income over the life of your
                              Certificate, often well before such income is
                              distributed in cash to you.

                              If you hold an Offered Certificate that has the
                              benefit of a yield maintenance agreement and is
                              entitled to certain payments from a reserve
                              account, you will be treated as owning two assets,
                              a REMIC regular interest and the right to receive
                              payments from the reserve fund and will be
                              required to account separately for each of these
                              assets for federal income tax purposes.

                              If you hold an Offered Certificate that is an
                              exchangeable certificate, you should be aware that
                              the arrangement under which any exchangeable
                              certificates are created will be classified as a
                              grantor trust and each class of exchangeable
                              certificates so created will represent beneficial
                              ownership of an interest in each related
                              exchangeable REMIC certificate.

Optional Termination Date.... On any Distribution Date on which the aggregate
                              Stated Principal Balance of the Mortgage Loans is
                              less than 10% of the initial aggregate unpaid
                              principal balance of the Mortgage Loans as of the
                              Cut-off Date, the Depositor may, at its option,
                              subject to certain conditions, purchase the
                              Mortgage Loans, which would effect an early
                              retirement of the Certificates.


Banc of America Securities LLC                                                 6
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              If the Mortgage Loans are divided into multiple
                              loan groups with more than one set of Subordinate
                              Certificates, the Depositor may, at its option,
                              subject to certain conditions, purchase the
                              Mortgage Loans in one or some of the loan groups,
                              which would effect an early retirement of only the
                              related Certificates.

The Pooling Agreement........ The Certificates will be issued pursuant to a
                              Pooling and Servicing Agreement (the "Pooling
                              Agreement") to be dated the Closing Date, among
                              the Depositor, the Servicer and the Trustee.

The Mortgage Pool............ The "Mortgage Pool" will consist of fixed interest
                              rate, fully-amortizing mortgage loans (the
                              "Mortgage Loans") secured by first liens on one-
                              to four-family residential properties. All of the
                              Mortgage Loans were originated or acquired by Bank
                              of America, National Association, which is an
                              affiliate of the Depositor and Banc of America
                              Securities LLC. In addition, certain of the
                              Mortgage Loans were originated using underwriting
                              standards that are different from, and in certain
                              respects, less stringent than the general
                              underwriting standards of Bank of America,
                              National Association. See "The Mortgage Loan
                              Programs--Mortgage Loan Underwriting" in the base
                              prospectus.

                              The Mortgage Pool may be divided into multiple
                              loan groups.

The Mortgage Loans........... The Mortgage Loans consist of fixed interest rate,
                              fully amortizing mortgage loans secured by first
                              liens on one- to four-family residential
                              properties. Substantially all of the Mortgage
                              Loans will have original terms to stated maturity
                              of approximately 10 to 40 years. Borrowers are
                              permitted to prepay their Mortgage Loans, in whole
                              or in part, at any time. If indicated in the
                              Collateral Summary at the end of this Free Writing
                              Prospectus, certain of the Mortgage Loans may be
                              subject to prepayment premiums. Accordingly, the
                              actual date on which any Mortgage Loan is paid in
                              full may be earlier than the stated maturity date
                              due to unscheduled payments of principal. See the
                              Collateral Summary at the end of this Free Writing
                              Prospectus for more information about the Mortgage
                              Loans.

Yield Maintenance
Agreements................... The Trustee on behalf of the Trust may enter into
                              one or more yield maintenance agreements (each, a
                              "Yield Maintenance Agreement") with one or more
                              counterparties (each, a "Counterparty") for the
                              benefit of one or more classes. With respect to
                              each Yield Maintenance Agreement for any
                              Distribution Date (other than the initial
                              Distribution Date) if LIBOR, as calculated for the
                              Interest Accrual Period related to such
                              Distribution Date, exceeds a designated strike
                              percentage, the Counterparty will be obligated to
                              pay to the Trustee, for deposit into the related
                              Reserve Fund, an amount equal to the product of
                              (a) the amount by which (i) the lesser of LIBOR
                              and a designated maximum


Banc of America Securities LLC                                                 7
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              percentage exceeds (ii) the designated strike
                              percentage, (b) the lesser of the applicable Class
                              Balance(s) and related notional amount as set
                              forth for such Distribution Date in the related
                              Yield Maintenance Agreement and (c) one-twelfth.

                              Pursuant to the Pooling Agreement, the Trustee
                              will establish a separate trust account (the
                              "Reserve Fund") for deposit of any payments that
                              it may receive under a Yield Maintenance
                              Agreement. Each Reserve Fund is part of the trust
                              fund but will not be an asset of any REMIC.

                              Amounts on deposit in a Reserve Fund will be used
                              to make certain payments on a specified Class or
                              Classes of Certificates that have the benefit of a
                              Yield Maintenance Agreement.

Compensating Interest........ Pursuant to the Pooling Agreement, the aggregate
                              Servicing Fee payable to the Servicer for any
                              month will be reduced (but not below zero) by an
                              amount equal to the lesser of (i) the aggregate of
                              the Prepayment Interest Shortfalls for such
                              Distribution Date and (ii) one-twelfth of 0.25% of
                              the aggregate Stated Principal Balance of the
                              Mortgage Loans as of the due date in the month
                              preceding the month of such Distribution Date
                              (such amount, the "Compensating Interest").

                              If a group of Subordinate Certificates supports
                              multiple groups of Senior Certificates,
                              Compensating Interest will be determined on an
                              aggregate basis with respect to all related loan
                              groups. If a group of Subordinate Certificates
                              supports one group of Senior Certificates,
                              Compensating Interest will be determined for the
                              related loan group.

Advances..................... Subject to certain limitations, the Servicer will
                              be required pursuant to the Pooling Agreement to
                              advance (any such advance, an "Advance") prior to
                              each Distribution Date an amount equal to the
                              aggregate of payments of principal and interest
                              (net of the Servicing Fee) which were due on the
                              related due date on the Mortgage Loans and which
                              were delinquent on the related Determination Date.
                              Advances made by the Servicer will be made from
                              its own funds or funds available for future
                              distribution. The obligation to make an Advance
                              with respect to any Mortgage Loan will continue
                              until the ultimate disposition of the REO Property
                              or Mortgaged Property relating to such Mortgage
                              Loan.

Interest Accrual............. Interest will accrue on the Certificates during
                              each one-month period (i) ending on the last day
                              of the month preceding the month in which each
                              Distribution Date occurs (each, a "Regular
                              Interest Accrual Period") or (ii) commencing on
                              the 25th day of the month preceding the month in
                              which each Distribution Date occurs and ending on
                              the 24th day of the month in which each
                              Distribution Date occurs (each, a "LIBOR Based
                              Interest Accrual Period" or "No Delay Interest


Banc of America Securities LLC                                                 8
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              Accrual Period" and together with a Regular
                              Interest Accrual Period, an "Interest Accrual
                              Period"). The initial Regular Interest Accrual
                              Period will be deemed to have commenced on March
                              1, 2007 and any initial LIBOR Based Interest
                              Accrual Period or No Delay Interest Accrual Period
                              will be deemed to have commenced on March 25,
                              2007.

                              On each Distribution Date, to the extent of the
                              applicable Pool Distribution Amount or Amounts,
                              each class of interest-bearing Certificates will
                              be entitled to receive interest (as to each such
                              class, the "Interest Distribution Amount") with
                              respect to the related Interest Accrual Period.
                              The Interest Distribution Amount for any
                              interest-bearing class of Certificates will be
                              equal to the sum of (i) interest accrued during
                              the related Interest Accrual Period at the
                              applicable pass-through rate on the related Class
                              Balance or notional amount and (ii) the sum of the
                              amounts, if any, by which the amount described in
                              clause (i) above on each prior Distribution Date
                              exceeded the amount actually distributed in
                              respect of interest on such prior Distribution
                              Dates and not subsequently distributed.

                              The interest entitlement described in clause (i)
                              of the Interest Distribution Amount for each class
                              of interest-bearing Senior Certificates and each
                              class of Subordinate Certificates will be reduced
                              by the amount of Net Interest Shortfalls for the
                              related Mortgage Loans for such Distribution Date.

                              Allocations of the interest portion of Realized
                              Losses on the Mortgage Loans in a loan group are
                              allocated first to the related Subordinate
                              Certificates in reverse order of payment priority
                              will result from the priority of distributions
                              first to the related Senior Certificates and then
                              to the classes of related Subordinate Certificates
                              in numerical order of the applicable Pool
                              Distribution Amount as described below under
                              "Priority of Distributions." After the date on
                              which the aggregate Class Balance of the related
                              Subordinate Certificates has been reduced to zero,
                              the interest-bearing related Senior Certificates
                              will bear the interest portion of any Realized
                              Losses on such Mortgage Loans pro rata based on
                              the interest entitlement described in clause (i)
                              of the applicable Interest Distribution Amount.

Distributions to the
Subordinate Certificates..... On each Distribution Date, each class of
                              Subordinate Certificates that is entitled to
                              receive a principal distribution will receive its
                              pro rata share (based on the Class Balances of all
                              the Subordinate Certificates (or the Subordinate
                              Certificates in the same group, if there is more
                              than one group of Subordinate Certificates) that
                              are entitled to receive a principal distribution)
                              of the Subordinate Principal Distribution
                              Amount(s), to the extent that the remaining Pool
                              Distribution


Banc of America Securities LLC                                                 9
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              Amount(s) are sufficient therefor. With respect to
                              each class of Subordinate Certificates, if on any
                              Distribution Date the Fractional Interest is less
                              than the Fractional Interest for that class on the
                              Closing Date, no classes of Subordinate
                              Certificates in the same group, if there is more
                              than one group of Subordinate Certificates, junior
                              to such class will be entitled to receive a
                              principal distribution.

                              Distributions of principal on the Subordinate
                              Certificates that are entitled to receive a
                              principal distribution on a Distribution Date will
                              be made sequentially to each class of Subordinate
                              Certificates in the order of their payment
                              priority until each such class has received its
                              respective pro rata share for the Distribution
                              Date. However, the Class PO Deferred Amounts will
                              be paid to the ratio strip components or
                              certificates from amounts otherwise payable as
                              principal to the related Subordinate Certificates,
                              beginning with the amounts otherwise distributable
                              as principal to the class of related Subordinate
                              Certificates lowest in order of payment priority.

Shifting Interest Structure.. Additional credit enhancement is provided by the
                              allocation of the applicable Non-PO Percentages of
                              principal prepayments on the Mortgage Loans in the
                              Mortgage Pool or a loan group in the Mortgage Pool
                              to the related Senior Non-PO Certificates for the
                              first five years and the disproportionately
                              greater allocation of prepayments to such Senior
                              Non-PO Certificates over the following four years.
                              The disproportionate allocation of the applicable
                              Non-PO Percentages of prepayments on the Mortgage
                              Loans in the Mortgage Pool or a loan group in the
                              Mortgage Pool will accelerate the amortization of
                              those Senior Certificates relative to the
                              amortization of the Subordinate Certificates. As a
                              result, the credit support percentage for the
                              Senior Certificates should be maintained and may
                              be increased during the first nine years.

Allocation of Losses......... On each Distribution Date, the applicable PO
                              Percentage of any Realized Loss on a Discount
                              Mortgage Loan will be allocated to the ratio strip
                              certificate or ratio strip component of the
                              related group until its Class Balance or principal
                              balance is reduced to zero. Such allocation will
                              be effected on each Distribution Date by reducing
                              the Class Balance of the ratio strip certificate
                              or principal balance of the ratio strip component
                              of the related group if and to the extent that
                              such balance (after taking into account the amount
                              of all distributions to be made on such
                              Distribution Date) exceeds the Adjusted Pool
                              Amount (PO Portion) for such Distribution Date.
                              The amount of any such Realized Loss allocated to
                              a ratio strip certificate or ratio strip component
                              of the related group will be treated as a "Class
                              PO Deferred Amount." To the extent funds are
                              available on such Distribution Date or on any
                              future Distribution Date from amounts that


Banc of America Securities LLC                                                10
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              would otherwise be allocable to the related
                              Subordinate Principal Distribution Amount or
                              Amounts, the Class PO Deferred Amounts for the
                              ratio strip certificate or ratio strip component
                              of the related group will be paid on such ratio
                              strip certificate or ratio strip component of the
                              related group prior to distributions of principal
                              on the related Subordinate Certificates. Payments
                              of the Class PO Deferred Amounts will be made from
                              the principal payable to the related Subordinate
                              Certificates beginning with the principal payable
                              to the class of Subordinate Certificates lowest in
                              order of payment priority. Any distribution in
                              respect of unpaid Class PO Deferred Amounts for a
                              ratio strip certificate or ratio strip component
                              of the related group will not further reduce the
                              principal balance of such ratio strip certificate
                              or ratio strip component of the related group. The
                              Class PO Deferred Amounts will not bear interest.
                              The Class Balance of the class of related
                              Subordinate Certificates then outstanding lowest
                              in the order of payment priority will be reduced
                              by the amount of any payments in respect of Class
                              PO Deferred Amounts for the ratio strip
                              certificate or ratio strip component of the
                              related group. Any excess of these Class PO
                              Deferred Amounts over the Class Balance of that
                              class will be allocated to the next most
                              subordinate class of related Subordinate
                              Certificates to reduce its Class Balance and so
                              on, as necessary.

                              On each Distribution Date, the applicable Non-PO
                              Percentage of any Realized Loss will be allocated
                              first to the related Subordinate Certificates in
                              reverse order of payment priority (beginning with
                              the class of related Subordinate Certificates then
                              outstanding lowest in order of payment priority),
                              in each case until the Class Balance of such class
                              of Certificates has been reduced to zero, and then
                              to the Senior Non-PO Certificates or to the Senior
                              Non-PO Certificates of the related group, if there
                              are multiple groups of Senior Non-PO Certificates
                              pro rata based on their respective Class Balances.

                              Such allocation will be effected on each such
                              Distribution Date by reducing the Class Balance of
                              the class of related Subordinate Certificates then
                              outstanding lowest in order of payment priority if
                              and to the extent that the aggregate of the Class
                              Balances of all classes of Senior Non-PO
                              Certificates or the Senior Non-PO Certificates in
                              a group and the related Subordinate Certificates
                              (after taking into account the amount of all
                              distributions to be made on such Distribution
                              Date) exceeds the Adjusted Pool Amount (Non-PO
                              Portion) or sum of the Adjusted Pool Amounts
                              (Non-PO Portion) for such Distribution Date.

                              After the date on which the aggregate Class
                              Balance of the related Subordinate Certificates
                              has been reduced to zero, on each Distribution
                              Date, the aggregate of the Class Balances of all
                              classes of Senior Non-


Banc of America Securities LLC                                                11
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              PO Certificates or all Senior Non-PO Certificates
                              of a group then outstanding will be reduced if and
                              to the extent that such aggregate Class Balance
                              (after taking into account the amount of all
                              distributions to be made on such Distribution
                              Date) exceeds the Adjusted Pool Amount (Non-PO
                              Portion) for such Distribution Date. The amount of
                              any such reduction will be allocated among the
                              Senior Non-PO Certificates or Senior Non-PO
                              Certificates of such group pro rata based on their
                              respective Class Balances (or their initial Class
                              Balances, if lower, in the case of a class of
                              Accrual Certificates).

                              After the date on which the aggregate Class
                              Balance of the related Subordinate Certificates
                              has been reduced to zero, the Class Balance of any
                              class of Super Senior Support Certificates will be
                              reduced not only by the principal portion of
                              Realized Losses allocated to such class as
                              provided in the preceding paragraph, but also by
                              the portion allocated to the related class or
                              classes of Super Senior Certificates.

Cross-Collateralization...... If one group of Subordinate Certificates support
                              multiple groups of Senior Certificates, on each
                              Distribution Date prior to the date on which the
                              aggregate Class Balance of such Subordinate
                              Certificates has been reduced to zero but on or
                              after the date on which the Class Balances of the
                              Senior Non-PO Certificates of a group have been
                              reduced to zero, amounts otherwise distributable
                              as principal payments on such Subordinate
                              Certificates will be paid as principal to the
                              remaining classes of Senior Non-PO Certificates of
                              each group supported by such Subordinate
                              Certificates together with the Senior Principal
                              Distribution Amount(s) in accordance with the
                              principal payment priorities provided that on such
                              Distribution Date (a) the Aggregate Subordinate
                              Percentage for such Distribution Date is less than
                              twice the initial Aggregate Subordinate Percentage
                              or (b) the average outstanding principal balance
                              of the Mortgage Loans (including, for this
                              purpose, any Mortgage Loan in foreclosure, any REO
                              Property and any Mortgage Loan for which the
                              mortgagor has filed for bankruptcy after the
                              Closing Date) delinquent 60 days or more over the
                              last six months as a percentage of the aggregate
                              Class Balance of the Subordinate Certificates is
                              greater than or equal to 50%. If the Senior Non-PO
                              Certificates of two or more groups remain
                              outstanding, the distributions described above
                              will be made to such Senior Certificates of such
                              groups, pro rata, in proportion to the aggregate
                              Class Balance of such Senior Certificates.

                              The "Aggregate Subordinate Percentage" for any
                              Distribution Date will be the percentage equal to
                              the aggregate Class Balance of the Subordinate
                              Certificates divided by the related aggregate Pool
                              Principal Balance (Non-PO Portion).


Banc of America Securities LLC                                                12
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              In addition, if on any Distribution Date, after
                              giving effect to the preceding paragraph, the
                              aggregate Class Balance of the Senior Non-PO
                              Certificates after giving effect to distributions
                              to be made on such Distribution Date is greater
                              than the Adjusted Pool Amount (Non-PO Portion)
                              (any such group, the "Undercollateralized Group"
                              and any such excess, the "Undercollateralized
                              Amount"), all amounts otherwise distributable as
                              principal on the Subordinate Certificates, in
                              reverse order of their payment priority, will be
                              paid as principal to the Senior Non-PO
                              Certificates of the Undercollateralized Group
                              together with the Senior Principal Distribution
                              Amount(s) in accordance with the principal payment
                              priorities until the aggregate Class Balance of
                              the Senior Non-PO Certificates of the
                              Undercollateralized Group equals the Adjusted Pool
                              Amount (Non-PO Portion). If two or more groups are
                              Undercollateralized Groups, the distributions
                              described above will be made, pro rata, in
                              proportion to the amount by which the aggregate
                              Class Balance of the Senior Non-PO Certificates of
                              each such group exceeds the related Pool Principal
                              Balance (Non-PO Portion).

                              The amount of any unpaid interest shortfall
                              amounts with respect to the Undercollateralized
                              Group (including any interest shortfall amount for
                              such Distribution Date) will be paid to the
                              Undercollateralized Group, including the interest
                              only component of such group, if any, prior to the
                              payment of any Undercollateralized Amount from
                              amounts otherwise distributable as principal on
                              the Subordinate Certificates, in reverse order of
                              their payment priority.

Adjusted Pool Amount......... The "Adjusted Pool Amount" of the Mortgage Pool or
                              a loan group in the Mortgage Pool will equal the
                              aggregate unpaid principal balance of the Mortgage
                              Loans in the Mortgage Pool or a loan group in the
                              Mortgage Pool as of the Cut-off Date minus the sum
                              of (i) all amounts in respect of principal
                              received in respect of such Mortgage Loans
                              (including amounts received as Advances, principal
                              prepayments and Liquidation Proceeds in respect of
                              principal) and distributed on the Certificates on
                              such Distribution Date and all prior Distribution
                              Dates and (ii) the principal portion of all
                              Realized Losses (other than debt service
                              reductions) incurred on such Mortgage Loans from
                              the Cut-off Date through the end of the month
                              preceding the month in which such Distribution
                              Date occurs.

Adjusted Pool Amount
(PO Portion)................. The "Adjusted Pool Amount (PO Portion)" of the
                              Mortgage Pool or a loan group in the Mortgage Pool
                              will equal the sum as to each Mortgage Loan in the
                              Mortgage Pool or a loan group in the Mortgage Pool
                              as of the Cut-off Date of the product of (A) the
                              PO Percentage for such Mortgage Loan and (B) the
                              principal balance of such Mortgage Loan as of the
                              Cut-off Date less the sum of (i) all amounts in
                              respect of principal received in respect of such
                              Mortgage Loan (including


Banc of America Securities LLC                                                13
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              amounts received as Advances, principal
                              prepayments and Liquidation Proceeds in respect of
                              principal) and distributed on the Certificates on
                              such Distribution Date and all prior Distribution
                              Dates and (ii) the principal portion of any
                              Realized Loss (other than a debt service
                              reduction) incurred on such Mortgage Loan from the
                              Cut-off Date through the end of the month
                              preceding the month in which such Distribution
                              Date occurs.

Adjusted Pool Amount
(Non-PO Portion)............. The "Adjusted Pool Amount (Non-PO  Portion)" of
                              the Mortgage Pool or a loan group in the Mortgage
                              Pool will equal the difference between the
                              Adjusted Pool Amount of the Mortgage Pool or a
                              loan group in the Mortgage Pool and the Adjusted
                              Pool Amount (PO Portion) of the Mortgage Pool or a
                              loan group in the Mortgage Pool.

Class Balance................ The "Class  Balance" of a class of Certificates
                              at any time will equal (a) its initial Class
                              Balance or in the case of a class of Exchangeable
                              REMIC Certificates or Exchangeable Certificates,
                              the portion of the maximum initial Class Balance
                              then represented by the outstanding Certificates
                              of such class of the maximum initial Class Balance
                              less (i) all distributions of principal made to
                              such class, and (ii) losses allocated to such
                              class plus (b) in the case of a class of Accrual
                              Certificates, any amounts added to such Class
                              Balance as a result of the application of the
                              accrual distribution amount.

Fractional Interest.......... The "Fractional Interest" with respect to any
                              Distribution Date and each class of Subordinate
                              Certificates will equal (i) the aggregate of the
                              Class Balances immediately prior to such
                              Distribution Date of all classes of Subordinate
                              Certificates in the same group that have higher
                              numerical class designations than such class,
                              divided by (ii) the aggregate Pool Principal
                              Balance (Non-PO Portion) (if there is only one
                              group of Subordinate Certificates) or the related
                              Pool Principal Balance (Non-PO Portion) or sum of
                              the related Pool Principal Balance (Non-PO
                              Portion) (if there is more than one group of
                              Subordinate Certificates).

Net Interest Shortfall....... With respect to any Distribution Date, the "Net
                              Interest Shortfall" is equal to the sum of (i) the
                              shortfall in interest received with respect to any
                              Mortgage Loan as a result of a Relief Act
                              Reduction and (ii) any Non-Supported Interest
                              Shortfalls. Net Interest Shortfalls on any
                              Distribution Date will be allocated pro rata among
                              all such classes of interest-bearing Senior
                              Certificates or if there are Crossed Groups, the
                              interest-bearing Senior Certificates of the
                              Crossed Groups and each class of related
                              Subordinate Certificates, based on the amount of
                              interest accrued on each such class of
                              Certificates on such Distribution


Banc of America Securities LLC                                                14
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              Date before taking into account any reduction in
                              such amounts resulting from such Net Interest
                              Shortfalls.

Net Mortgage Interest Rate... The "Net Mortgage Interest Rate" of a Mortgage
                              Loan is the excess of its mortgage interest rate
                              over the sum of the servicing fee rate (which is .
                              25%) and the trustee fee rate (which is .0075%).

Non-PO Percentage............ The "Non-PO Percentage" with respect to any
                              Mortgage Loan in the Mortgage Pool or loan group
                              in the Mortgage Pool with a Net Mortgage Interest
                              Rate as of the Cut-off Date less than a certain
                              rate (each such Mortgage Loan, a "Discount
                              Mortgage Loan") will be equal to the Net Mortgage
                              Interest Rate as of the Cut-off Date divided by
                              such applicable rate. If there are multiple loan
                              groups in the Mortgage Pool, this rate may be the
                              same for each loan group or may differ for one or
                              more loan groups. The Non-PO Percentage with
                              respect to any Mortgage Loan in the Mortgage Pool
                              or loan group in the Mortgage Pool with a Net
                              Mortgage Interest Rate as of the Cut-off Date
                              equal to or greater than the applicable rate will
                              be 100%. The "PO Percentage" for any Discount
                              Mortgage Loan will be equal to 100% minus the
                              Non-PO Percentage for such Mortgage Loan. If there
                              are no ratio strip certificates in a group, the
                              Non-PO Percentage for each Mortgage Loan in the
                              related loan group will be 100% and the PO
                              Percentage for each Mortgage Loan in such loan
                              group will be 0%.

                              Any Mortgage Loan with a Net Mortgage Interest
                              Rate as of the Cut-off Date greater than or equal
                              to the applicable rate for the Mortgage Pool or
                              the loan group in the Mortgage Pool is a "Premium
                              Mortgage Loan."

Non-PO Principal Amount...... The "Non-PO Principal Amount" for any Distribution
                              Date and the Mortgage Pool or any loan group in
                              the Mortgage Pool will equal the sum of the
                              applicable Non-PO Percentage of:

                              (a)  all monthly payments of principal due on each
                                   Mortgage Loan in the Mortgage Pool or loan
                                   group in the Mortgage Pool on the related due
                                   date;

                              (b)  the principal portion of the purchase price
                                   (net of unreimbursed Advances and other
                                   amounts as to which the Servicer is entitled
                                   to be reimbursed pursuant to the Pooling
                                   Agreement) of each Mortgage Loan in the
                                   Mortgage Pool or loan group in the Mortgage
                                   Pool that was repurchased by the Depositor
                                   pursuant to the Pooling Agreement during the
                                   calendar month preceding the month of that
                                   Distribution Date;


Banc of America Securities LLC                                                15
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              (c)  amounts received with respect to such
                                   Distribution Date as a substitution
                                   adjustment amount (net of unreimbursed
                                   Advances and other amounts as to which the
                                   Servicer is entitled to be reimbursed
                                   pursuant to the Pooling Agreement) in
                                   connection with a Mortgage Loan in the
                                   Mortgage Pool or loan group in the Mortgage
                                   Pool received during the calendar month
                                   preceding the month of that Distribution
                                   Date;

                              (d)  any Liquidation Proceeds (net of unreimbursed
                                   expenses and unreimbursed Advances, if any)
                                   allocable to recoveries of principal of the
                                   Mortgage Loans in the Mortgage Pool or loan
                                   group in the Mortgage Pool that have not yet
                                   been liquidated received during the calendar
                                   month preceding the month of that
                                   Distribution Date;

                              (e)  with respect to each Mortgage Loan in the
                                   Mortgage Pool or loan group in the Mortgage
                                   Pool that was liquidated during the calendar
                                   month preceding the month of that
                                   Distribution Date, the amount of the
                                   Liquidation Proceeds (other than any profits
                                   retained by the Servicer in connection with
                                   the foreclosure and net of unreimbursed
                                   expenses and unreimbursed Advances, if any)
                                   allocable to principal received with respect
                                   to that Mortgage Loan; and

                              (f)  all partial and full principal prepayments on
                                   the Mortgage Loans in the Mortgage Pool or
                                   loan group in the Mortgage Pool by mortgagors
                                   received during the calendar month preceding
                                   the month of that Distribution Date.

                              The amounts described in clauses (a) through (d)
                              are referred to as "Scheduled Principal Payments."
                              The amounts described in clauses (e) and (f) are
                              referred to as "Unscheduled Principal Payments."

Non-Supported
Interest Shortfall........... With respect to any Distribution Date, the
                              "Non-Supported Interest Shortfall" is the amount
                              by which the aggregate of Prepayment Interest
                              Shortfalls for the Mortgage Loans in the Mortgage
                              Pool or the Mortgage Loans in any Crossed Loan
                              Groups during the calendar month preceding the
                              month of such Distribution Date exceeds the
                              applicable Compensating Interest for such period.

Notional Amount.............. The "Notional Amount" of any Interest Only
                              Certificates (or any components of an Interest
                              Only Certificates) will be equal to either (I) the
                              product of (i) the aggregate of the Stated
                              Principal Balances of the Premium Mortgage Loans
                              in the Mortgage Pool or loan group as of the due
                              date in the month preceding the month of such
                              Distribution


Banc of America Securities LLC                                                16
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              Date and (ii) a fraction, (a) the numerator of
                              which is equal to the weighted average of the Net
                              Mortgage Interest Rates of the these Mortgage
                              Loans (based on the Stated Principal Balances of
                              these Mortgage Loans as of the due date in the
                              month preceding the month of such Distribution
                              Date) minus a specified percentage and (b) the
                              denominator of which is equal to a specified
                              percentage or (II) a percentage or all of the
                              Class Balance(s) of another class or classes.

Pool Distribution Amount..... The "Pool Distribution Amount" with respect to any
                              Distribution Date will be determined by reference
                              to amounts received and expenses incurred in
                              connection with the Mortgage Loans in the Mortgage
                              Pool or any loan group in the Mortgage Pool and
                              will be equal to the sum of:

                              (i)   all scheduled installments of interest (net
                                    of the related Servicing Fee) and principal
                                    due on such Mortgage Loans on the due date
                                    in the month in which such Distribution Date
                                    occurs and received prior to the related
                                    Determination Date, together with any
                                    Advances in respect thereof and any
                                    Compensating Interest allocable to such
                                    Mortgage Loans;

                              (ii)  all proceeds of any primary mortgage
                                    guaranty insurance policies and any other
                                    insurance policies with respect to such
                                    Mortgage Loans, to the extent such proceeds
                                    are not applied to the restoration of the
                                    related mortgaged property or released to
                                    the mortgagor in accordance with the
                                    Servicer's normal servicing procedures and
                                    all other cash amounts received and retained
                                    in connection with the liquidation of
                                    defaulted Mortgage Loans in the Mortgage
                                    Pool or any loan group in the Mortgage Pool,
                                    by foreclosure or otherwise (collectively,
                                    "Liquidation Proceeds"), during the calendar
                                    month preceding the month of such
                                    Distribution Date (in each case, net of
                                    unreimbursed expenses incurred in connection
                                    with a liquidation or foreclosure and
                                    unreimbursed Advances, if any);

                              (iii) all partial or full prepayments received on
                                    such Mortgage Loans during the calendar
                                    month preceding the month of such
                                    Distribution Date; and

                              (iv)  amounts received with respect to such
                                    Distribution Date as a substitution
                                    adjustment amount or purchase price in
                                    respect of any deleted Mortgage Loan in the
                                    Mortgage Pool or any loan group in the
                                    Mortgage Pool or amounts received in
                                    connection with the optional termination of
                                    the Trust or a portion of the Trust as of
                                    such Distribution Date, reduced by amounts
                                    in reimbursement for Advances previously
                                    made and other


Banc of America Securities LLC                                                17
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                                    amounts as to which the Servicer is entitled
                                    to be reimbursed pursuant to the Pooling
                                    Agreement.

Pool Principal Balance....... The "Pool Principal Balance" for the Mortgage Pool
                              or a loan group in the Mortgage Pool with respect
                              to any Distribution Date equals the aggregate
                              Stated Principal Balances of the Mortgage Loans in
                              the Mortgage Pool or loan group in the Mortgage
                              Pool outstanding on the due date in the month
                              preceding the month of such Distribution Date.

Pool Principal Balance
(Non-PO Portion)............. The "Pool Principal Balance (Non-PO Portion)"
                              for the Mortgage Pool or a loan group in the
                              Mortgage Pool and any Distribution Date equals the
                              sum of the product, for each Mortgage Loan in the
                              Mortgage Pool or loan group in the Mortgage Pool,
                              of the Non-PO Percentage of such Mortgage Loan
                              multiplied by its Stated Principal Balance on the
                              due date in the month preceding the month of such
                              Distribution Date.

Prepayment
Interest Shortfall........... A "Prepayment Interest Shortfall" on a Mortgage
                              Loan is equal to the difference between (x) 30
                              days' interest at the mortgage interest rate (less
                              the servicing fee rate) on the amount of the
                              prepayment on such Mortgage Loan minus (y) the
                              amount of interest actually paid by the related
                              mortgagor on the amount of such prepayment during
                              the preceding month.

Realized Loss................ In general, a "Realized Loss" means, (a) with
                              respect to a Mortgage Loan that has been
                              liquidated, the amount by which the remaining
                              unpaid principal balance of the Mortgage Loan
                              exceeds the amount of proceeds from the
                              liquidation applied to the principal balance of
                              the related Mortgage Loan and (b) losses due to
                              the bankruptcy of the mortgagor.

Relief Act Reduction......... A "Relief Act Reduction" is a reduction in the
                              amount of monthly interest payment on a Mortgage
                              Loan pursuant to the Servicemembers Civil Relief
                              Act or similar state legislation.

REO Property................. An "REO Property" is a Mortgaged Property that
                              has been acquired by the Trust through foreclosure
                              or grant of a deed in lieu of foreclosure.

Senior Percentage............ The Senior Percentage for the Mortgage Pool or
                              loan group in the Mortgage Pool will equal (i) the
                              aggregate Class Balance of the related Senior
                              Non-PO Certificates immediately prior to such
                              date, divided by (ii) the Pool Principal Balance
                              (Non-PO Portion) for the Mortgage Pool or loan
                              group in the Mortgage Pool for such date.


Banc of America Securities LLC                                                18
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

Senior Prepayment
Percentage................... For the following Distribution Dates, will be as
                              follows:



                               Distribution Date                   Senior Prepayment Percentage
                              -------------------------    ------------------------------------------
                                                        
                              April 2007 through           100%;
                              March 2012
                              April 2012 through           the applicable Senior Percentage plus, 70%
                              March 2013                   of the applicable Subordinate Percentage;
                              April 2013 through           the applicable Senior Percentage plus, 60%
                              March 2014                   of the applicable Subordinate Percentage;
                              April 2014 through           the applicable Senior Percentage plus, 40%
                              March 2015                   of the applicable Subordinate Percentage;
                              April 2015 through           the applicable Senior Percentage plus, 20%
                              March 2016                   of the applicable Subordinate Percentage;
                              April 2016 and thereafter    the applicable Senior Percentage;


                              provided, however, that (A) if on any Distribution
                              Date the percentage equal to (x) the aggregate
                              Class Balances of the Senior Non-PO Certificates
                              of multiple groups with one set of Subordinate
                              Certificates (such groups, "Crossed Groups")
                              divided by (y) the sum of the Pool Principal
                              Balances (Non-PO Portion) for the loan groups
                              relating to the Crossed Groups (such loan groups,
                              the "Crossed Loan Groups" and such percentage, the
                              "Crossed Group Total Senior Percentage") exceeds
                              such percentage as of the Closing Date, then the
                              Senior Prepayment Percentages for the Crossed Loan
                              Groups for such Distribution Date will equal 100%
                              and (B) in the case of one group of Senior Non-PO
                              Certificates with its own set of Subordinate
                              Certificates or if the Mortgage Pool is not
                              divided into loan groups, if on any Distribution
                              Date the Senior Percentage for the Mortgage Pool
                              or the related loan group of the Mortgage Pool
                              (the Mortgage Loans in the Mortgage Pool or such
                              loan group, "Non-Crossed Mortgage Loans") exceeds
                              such percentage as of the Closing Date, then the
                              Senior Prepayment Percentage(s) for the Mortgage
                              Pool or such loan group for such Distribution Date
                              will equal 100%.

                              No decrease in the Senior Prepayment Percentages
                              for the Crossed Loan Groups will occur if the
                              following occurs as of any Distribution Date as to
                              which any such decrease applied with respect to
                              the Crossed Loan Group Mortgage Loans, and no
                              decrease in the Senior Prepayment Percentage for
                              the Non-Crossed Mortgage Loans will occur if the
                              following occurs as of any Distribution Date as to
                              which any such decrease applied with respect to
                              the Non-Crossed Mortgage Loans: (i) the
                              outstanding principal balance of all Mortgage
                              Loans in the Crossed Loan Groups or all
                              Non-Crossed Mortgage Loans


Banc of America Securities LLC                                                19
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              (including, for this purpose, any Mortgage Loans
                              in foreclosure, any REO Property in such loan
                              group or loan groups and any Mortgage Loan for
                              which the mortgagor has filed for bankruptcy after
                              the Closing Date) delinquent 60 days or more
                              (averaged over the preceding six-month period), as
                              a percentage of the aggregate Class Balance of the
                              related Subordinate Certificates, is equal to or
                              greater than 50%, or (ii) cumulative Realized
                              Losses with respect to the Mortgage Loans in the
                              Crossed Loan Groups or all Non-Crossed Mortgage
                              Loans exceed the percentages of the aggregate
                              balance of the related Subordinate Certificates as
                              of the Closing Date (with respect to the related
                              Subordinate Certificates, the "Original
                              Subordinate Principal Balance") indicated below:



                                                                            % of Original Subordinate
                                Distribution Date Occurring                     Principal Balance
                              ------------------------------                -------------------------
                                                                                     
                              April 2012 through March 2013                             30%
                              April 2013 through March 2014                             35%
                              April 2014 through March 2015                             40%
                              April 2015 through March 2016                             45%
                              April 2016 and thereafter                                 50%


                              The Subordinate Prepayment Percentage for the
                              Mortgage Pool or loan group in the Mortgage Pool
                              for any Distribution Date will equal 100% minus
                              the Senior Prepayment Percentage for the Mortgage
                              Pool or such loan group in the Mortgage Pool for
                              such date.

Senior Principal
Distribution Amount.......... The "Senior Principal Distribution Amount" for the
                              Mortgage Pool or loan group in the Mortgage Pool
                              and any Distribution Date will equal the sum of
                              (i) the Senior Percentage for the Mortgage Pool or
                              loan group in the Mortgage Pool of the applicable
                              Non-PO Percentage of Scheduled Principal Payments
                              for such Distribution Date and (ii) the Senior
                              Prepayment Percentage for the Mortgage Pool or
                              loan group in the Mortgage Pool of the applicable
                              Non-PO Percentage of Unscheduled Principal
                              Payments for such Distribution Date subject to
                              certain reductions due to losses.

Stated Principal Balance..... The "Stated Principal Balance" means, as to any
                              Mortgage Loan and due date, the unpaid principal
                              balance of such Mortgage Loan as of such due date,
                              as specified in the amortization schedule at the
                              time relating thereto (before any adjustment to
                              such amortization schedule by reason of any
                              moratorium or similar waiver or grace period),
                              after giving effect to any previous partial
                              principal prepayments and Liquidation Proceeds
                              (net of unreimbursed expenses and unreimbursed
                              Advances) allocable to principal received and to
                              the payment of principal due on such due date and
                              irrespective of any delinquency in payment by the
                              related mortgagor and after giving effect to any
                              deficient valuation by a court in connection with
                              a bankruptcy.


Banc of America Securities LLC                                                20
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

Subordinate Percentage....... The Subordinate Percentage for the Mortgage Pool
                              or loan group in the Mortgage Pool for any
                              Distribution Date will equal 100% minus the Senior
                              Percentage for such date.

Subordinate Prepayment
Percentage................... The Subordinate Prepayment Percentage for the
                              Mortgage Pool or loan group in the Mortgage Pool
                              for any Distribution Date will equal 100% minus
                              the Senior Prepayment Percentage for the Mortgage
                              Pool or such loan group in the Mortgage Pool for
                              such date.

Subordinate Principal
Distribution Amount.......... The "Subordinate Principal Distribution Amount"
                              for the Mortgage Pool or loan group in the
                              Mortgage Pool for any Distribution Date will equal
                              the sum of (i) the Subordinate Percentage for the
                              Mortgage Pool or loan group in the Mortgage Pool
                              of the applicable Non-PO Percentage of Scheduled
                              Principal Payments for such Distribution Date and
                              (ii) the Subordinate Prepayment Percentage for the
                              Mortgage Pool or loan group in the Mortgage Pool
                              of the applicable Non-PO Percentage of Unscheduled
                              Principal Payments for such Distribution Date.

Exchangeable REMIC
Certificates and
Exchangeable Certificates.... Certain Classes of Offered Certificates identified
                              as "Exchangeable REMIC Certificates" may be
                              exchanged in certain allowable combinations (a
                              "REMIC Combination") for a proportionate interest
                              in certain related Certificates identified as
                              "Exchangeable Certificates." All or a portion of
                              the Exchangeable Certificates in an Exchangeable
                              Combination may also be exchanged for a
                              proportionate interest in each class of
                              Exchangeable REMIC Certificates in the related
                              REMIC Combination in the same manner. This process
                              may occur repeatedly.

                              The classes of Exchangeable REMIC Certificates and
                              of Exchangeable Certificates that are outstanding
                              at any given time, and the outstanding Class
                              Balances and notional amounts, if any, of these
                              classes, will depend upon any related
                              distributions of principal, as well as any
                              exchanges that occur. Exchangeable REMIC
                              Certificates and Exchangeable Certificates in any
                              combination may be exchanged only in the
                              proportion that the maximum initial Class Balances
                              and notional amounts, if any, of such Certificates
                              bear to one another as shown in the prospectus
                              supplement.

                              Holders of each class of Exchangeable Certificates
                              in an allowable combination will be the beneficial
                              owners of a proportionate interest in


Banc of America Securities LLC                                                21
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              the Exchangeable REMIC Certificates of the related
                              REMIC Combination.

                              In the event that Exchangeable REMIC Certificates
                              are exchanged for an allowable combination of
                              Exchangeable Certificates, then

                              o    the aggregate principal balance of the
                                   Exchangeable Certificates received in the
                                   exchange will equal the aggregate principal
                                   balance, immediately prior to the exchange,
                                   of the Exchangeable REMIC Certificates so
                                   exchanged; and

                              o    the aggregate amount of interest and
                                   principal payable on each distribution date
                                   with respect to the Exchangeable Certificates
                                   received in the exchange will equal the
                                   aggregate amount of interest and principal
                                   that would have been payable on the
                                   Exchangeable REMIC Certificates so exchanged
                                   if the exchange had not occurred; and

                              o    the aggregate amount of principal and
                                   interest losses and interest shortfalls
                                   allocated to the Exchangeable Certificates
                                   received in the exchange will equal the
                                   aggregate amount of principal and interest
                                   losses and interest shortfalls that would
                                   have been allocated to the Exchangeable REMIC
                                   Certificates so exchanged if the exchange had
                                   not occurred.

                              Each class of Exchangeable Certificates in an
                              allowable combination (other than a class of
                              interest only certificates, if any) will be
                              entitled to its proportionate share of the
                              principal distributions that would have been
                              payable on the Exchangeable REMIC Certificates so
                              exchanged if the exchange had not occurred. In
                              addition, each class of Exchangeable Certificates
                              (other than a class of interest only certificates,
                              if any) in an allowable combination will bear a
                              proportionate share of principal losses that would
                              have been allocated to the Exchangeable REMIC
                              Certificates so exchanged if the exchange had not
                              occurred.


Banc of America Securities LLC                                                22
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                           Preliminary Credit Support
- ------------------------------------------------------------------------------

Subordinate Certificates provide credit support for Senior Certificates. If the
Senior Certificates are divided into multiple groups, the Subordinate
Certificates may or may not consist of multiple groups. If there are multiple
groups of Subordinate Certificates, each group will support one or more groups
of Senior Certificates. Additional credit enhancement is provided by the
allocation of the applicable Non-PO Percentages of all principal prepayments on
the applicable Mortgage Loans to the related Senior Non-PO Certificates, subject
to certain exceptions, for the first five years and the disproportionately
greater allocation of prepayments to such Senior Non-PO Certificates over the
following four years. The disproportionate allocation of the applicable Non-PO
Percentages of prepayments on the Mortgage Loans will accelerate the
amortization of those Senior Non-PO Certificates relative to the amortization of
the related Subordinate Certificates. As a result, the credit support percentage
for the Senior Certificates should be maintained and may be increased during the
first nine years. If there is one group of Subordinate Certificates, the initial
credit support percentage for the Senior Certificates (calculated by dividing
the initial Class Balance of the Subordinate Certificates by the aggregate Pool
Principal Balance) is expected to be 7.02% (+/- 50 basis points).


- ------------------------------------------------------------------------------
                           Priority of Distributions
- ------------------------------------------------------------------------------

Distributions will be made on each Distribution Date from the Pool Distribution
Amount (if the Mortgage Pool is not divided into loan groups) or Amounts (if
there are multiple loan groups, in which case the Senior Certificates and any
components of a group will be paid from the related Pool Distribution Amount) in
the following order of priority:

                   -------------------------------------------
                         First, to the classes of Senior
                       Certificates and component (if any)
                    entitled to payments of interest, to pay
                                    interest;
                   -------------------------------------------
                                       |
                                       |
                                       |
                                       V
                   -------------------------------------------
                     Second, pro rata, to the Senior Non-PO
                        Certificates and any ratio strip
                      component or ratio strip certificates
                    entitled to payments of principal, to pay
                                   principal;
                   -------------------------------------------
                                       |
                                       |
                                       |
                                       V
                   -------------------------------------------
                     Third, to any ratio strip component or
                      ratio strip certificates, to pay any
                     Class PO Deferred Amounts, from amounts
                      otherwise payable as principal to the
                        related Subordinate Certificates;
                   -------------------------------------------
                                       |
                                       |
                                       |
                                       V
                   -------------------------------------------
                             Fourth, subject to any
                        cross-collateralization payments,
                         sequentially, to each class of
                    Subordinate Certificates from the related
                     Pool Distribution Amount or Amounts to
                     pay interest and principal in the order
                      of payment priority, until each Class
                              Balance is zero; and
                   -------------------------------------------
                                       |
                                       |
                                       |
                                       V
                   -------------------------------------------
                       Fifth, to the residual certificate,
                             any remaining amounts.
                   -------------------------------------------


Banc of America Securities LLC                                                23
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

The Sponsor and Servicer..... Bank of America, National Association ("Bank of
                              America") will serve as the sponsor (the
                              "Sponsor") and the servicer (the "Servicer") of
                              the Certificates.

                              See "The Sponsor," "The Mortgage Loan Programs,"
                              "Servicing of the Mortgage Loans" and "The Pooling
                              Agreement" in the base prospectus for more
                              information about the Sponsor, its securitization
                              programs, its solicitation and underwriting
                              criteria used to originate the Mortgage Loans and
                              its material roles and duties in this transaction.

                              All of the Mortgage Loans will be serviced by the
                              Servicer in accordance with the terms of the
                              Pooling Agreement. The Servicer may perform any of
                              its obligations under the Pooling Agreement
                              through one or more subservicers. Despite the
                              existence of subservicing arrangements, the
                              Servicer will be liable for its servicing duties
                              and obligations under the Pooling Agreement as if
                              the Servicer alone were servicing the Mortgage
                              Loans. See "The Sponsor," "Servicing of the
                              Mortgage Loans -- The Servicers," "-- Servicing
                              Experience and Procedures of Bank of America" and
                              "The Pooling Agreement" in the base prospectus for
                              more information about the Servicer, the
                              Servicer's experience, its servicing procedures
                              and its obligations under the Pooling Agreement.

Static Pool Information...... Information concerning the Sponsor's prior
                              residential mortgage loan securitizations
                              involving both fixed-rate first lien mortgage
                              loans underwritten in accordance with the
                              Sponsor's general underwriting standards described
                              in the base prospectus under "The Mortgage Loan
                              Programs--Mortgage Loan Underwriting--Bank of
                              America General Underwriting Standards" and first
                              lien mortgage loans underwritten in accordance
                              with the Sponsor's alternative underwriting
                              standards described in the base prospectus under
                              "--Bank of America Alternative Underwriting
                              Standards," and, in each case, issued by the
                              Depositor or the Depositor's predecessor is
                              available on the internet at
                              http://corp.bankofamerica.com/public/regulationab/
                              boams/index.jsp. Although those securitizations
                              involve the most comparable type of mortgage loans
                              to the type of Mortgage Loans contained in the
                              Mortgage Pool, the Sponsor also maintains on that
                              website, for the information of investors,
                              statistical data concerning the Sponsor's prior
                              residential mortgage loan securitizations
                              involving either fixed-rate first lien mortgage
                              loans or adjustable-rate first lien mortgage loans
                              underwritten in accordance with the Sponsor's
                              general underwriting standards issued by the
                              Depositor or the Depositor's predecessor.

                              Without charge or registration, investors can view
                              on this website the following information for each
                              of those securitizations:


Banc of America Securities LLC                                                24
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                          Preliminary Summary of Terms
- --------------------------------------------------------------------------------

                              o    summary initial pool information; and

                              o    delinquency, cumulative loss, and prepayment
                                   information as of each Distribution Date for
                                   the five years preceding the date of first
                                   use of the prospectus supplement.

                              In the event any changes or updates are made to
                              the information available on the Sponsor's
                              website, the Depositor will provide a copy of the
                              original information upon request to any person
                              who writes or calls the Depositor. The Depositor's
                              address is 214 North Tryon Street, Mail Code
                              NC1-027-22-02, Charlotte, North Carolina 28255.
                              Its telephone number is (704) 387-8239.

                              This static pool data may have been influenced in
                              the past by factors beyond the Sponsor's control,
                              such as unusually robust housing prices, low
                              interest rates and changes in product type.
                              Therefore, the performance of prior residential
                              mortgage loan securitizations may not be
                              indicative of the future performance of the
                              Mortgage Loans.


Banc of America Securities LLC                                                25
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

                              YOU SHOULD FULLY  CONSIDER THE RISKS  ASSOCIATED
                              WITH AN INVESTMENT IN THE OFFERED  CERTIFICATES.
                              BEFORE  INVESTING  YOU SHOULD  CAREFULLY  REVIEW
                              "RISK FACTORS" IN THE BASE  PROSPECTUS  TOGETHER
                              WITH THE RISK FACTORS SET FORTH BELOW.

Subordination of any
Super Senior Support
and Subordinate
Certificates Increases
Risk of Loss................. Subordinate certificateholders are more likely to
                              suffer losses as a result of losses or
                              delinquencies on the related Mortgage Loans than
                              are Senior certificateholders.

                              o    The rights of each class of Subordinate
                                   Certificates to receive distributions of
                                   interest and principal are subordinated to
                                   the rights of the related Senior Certificates
                                   and each class of related Subordinate
                                   Certificates higher in order of payment
                                   priority.

                              o    Losses that are realized on the Mortgage
                                   Loans will be allocated first to the class of
                                   related Subordinate Certificates lowest in
                                   order of payment priority, then to the class
                                   of related Subordinate Certificates next
                                   lowest in order of payment priority and so
                                   on, in reverse order of payment priority
                                   until the outstanding Class Balances of such
                                   classes have been reduced to zero.

                              Any Super Senior Support certificateholders should
                              consider the risk that after the related
                              Subordinate Certificates are no longer
                              outstanding, the principal portion of losses
                              realized on the applicable Mortgage Loans that are
                              allocated to a class of Super Senior Certificates
                              will be borne by the related class of Super Senior
                              Support Certificates, rather than such class of
                              Super Senior Certificates.

The Rate of Principal
Payments on the Mortgage
Loans Will Affect
the Yield on the
Offered Certificates......... Because principal payments on the Mortgage Loans
                              will be distributed currently on the related
                              Senior Certificates and the related Subordinate
                              Certificates, the rate of distributions of
                              principal and the yield to maturity on your
                              Certificates will be directly related to (i) the
                              rate and timing of payments of principal on the
                              applicable Mortgage Loans and (ii) the amount and
                              timing of defaults by borrowers that result in
                              losses on the applicable Mortgage Loans. Borrowers
                              are permitted to prepay their Mortgage Loans, in
                              whole or in part, at any time. The principal
                              payments on the Mortgage Loans may be in the form
                              of scheduled principal payments or principal
                              prepayments (for this purpose, the term "principal
                              prepayment" includes prepayments and any other
                              recovery of principal in advance of the scheduled
                              due date, including repurchases and liquidations
                              due to default, casualty, condemnation and


Banc of America Securities LLC                                                26
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

                              the like). Any of these prepayments will result in
                              distributions to you of amounts that would
                              otherwise be distributed over the remaining term
                              of the Mortgage Loans.

                              The rate of principal payments on the Mortgage
                              Loans will be affected by the following:

                              o    the amortization schedules of the Mortgage
                                   Loans;

                              o    the rate of partial prepayments and full
                                   prepayments by borrowers due to refinancing,
                                   job transfer, changes in property values or
                                   other factors;

                              o    liquidations of the properties that secure
                                   defaulted Mortgage Loans;

                              o    repurchases of Mortgage Loans by the
                                   Depositor as a result of defective
                                   documentation or breaches of representations
                                   or warranties;

                              o    the exercise of due-on-sale clauses by the
                                   Servicer in connection with transfers of
                                   mortgaged properties;

                              o    the optional repurchase of all the Mortgage
                                   Loans by the Depositor to effect a
                                   termination of the Trust or certain of the
                                   Mortgage Loans in the Trust when the
                                   aggregate Stated Principal Balance of the
                                   related Mortgage Loans is less than 10% of
                                   the aggregate unpaid principal balance of
                                   such Mortgage Loans as of the cut-off date;
                                   and

                              o    general and targeted solicitations for
                                   refinancing by mortgage originators
                                   (including the Sponsor).

                              The rate of principal payments on the Mortgage
                              Loans will depend greatly on the level of mortgage
                              interest rates:

                              o    If prevailing interest rates for similar
                                   mortgage loans fall below the interest rates
                                   on the Mortgage Loans in the Trust, the rate
                                   of prepayment is likely to increase.

                              o    Conversely, if prevailing interest rates for
                                   similar mortgage loans rise above the
                                   interest rates on the Mortgage Loans in the
                                   Trust, the rate of prepayment is likely to
                                   decrease.

                              If you are purchasing any Offered Certificates at
                              a discount, and specifically if you are purchasing
                              principal only certificates, you should consider
                              the risk that if principal payments on the
                              applicable Mortgage


Banc of America Securities LLC                                                27
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

                              Loans, or in the case of any ratio strip
                              certificates, some or all of the Discount Mortgage
                              Loans, occur at a rate slower than you expected,
                              your yield will be lower than you expected. If you
                              are purchasing any Offered Certificates at a
                              premium, and specifically if you are purchasing
                              interest only certificates, you should consider
                              the risk that if principal payments on the
                              applicable mortgage loans or, in the case of
                              interest only certificates whose notional amount
                              is based on some or all of the Premium Mortgage
                              Loans, such Premium Mortgage Loans, occur at a
                              rate faster than you expected, your yield may be
                              lower than you expected. You must make your own
                              decisions as to the appropriate prepayment
                              assumptions to be used when purchasing any Offered
                              Certificates. The applicable Senior Prepayment
                              Percentage of the applicable Non-PO Percentage of
                              all principal prepayments (excluding for this
                              purpose, partial liquidations due to default,
                              casualty, condemnation and the like) initially
                              will be distributed to the classes of related
                              Senior Non-PO Certificates then entitled to
                              receive principal prepayment distributions. This
                              may result in all (or a disproportionate
                              percentage) of those principal prepayments being
                              distributed to such Senior Non-PO Certificates and
                              none (or less than their pro rata share) of such
                              principal prepayments being distributed to holders
                              of the related Subordinate Certificates during the
                              periods of time described in the applicable
                              definition of "Senior Prepayment Percentage."

                              The timing of changes in the rate of prepayments
                              may significantly affect the actual yield to you,
                              even if the average rate of principal prepayments
                              is consistent with your expectations. In general,
                              the earlier the payment of principal of the
                              related Mortgage Loans, the greater the effect on
                              your yield to maturity. As a result, the effect on
                              your yield of principal prepayments occurring at a
                              rate higher (or lower) than the rate you
                              anticipate during the period immediately following
                              the issuance of the certificates will not be
                              offset by a subsequent like reduction (or
                              increase) in the rate of principal prepayments.

Any Yield Maintenance
Agreement is Subject
to Counterparty Risk......... The Trustee on behalf of the Trust may enter into
                              one or more Yield Maintenance Agreements with one
                              or more counterparties, for the benefit of certain
                              Classes of Certificates. Each Yield Maintenance
                              Agreement will require the applicable counterparty
                              to make certain payments in certain circumstances.
                              To the extent that payments on such Certificates
                              depend in part on payments to be received by the
                              Trustee under the related Yield Maintenance
                              Agreement, the ability of the Trustee to make such
                              payments on such Certificates will be subject to
                              the credit risk of the applicable counterparty.


Banc of America Securities LLC                                                28
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

Delinquencies and
Losses on the Mortgage
Loans Will Adversely
Affect Your Yield............ Delinquencies on the mortgage loans which are
                              not advanced by or on behalf of the Servicer
                              (because the Servicer has determined that these
                              amounts, if advanced, would be nonrecoverable),
                              will adversely affect the yield on the related
                              Senior Certificates and the related Subordinate
                              Certificates. The Servicer will determine that a
                              proposed advance is nonrecoverable when, in the
                              good faith exercise of its servicing judgment, it
                              believes the proposed advance would not be
                              ultimately recoverable from the related mortgagor,
                              related liquidation proceeds, or other recoveries
                              in respect of the Mortgage Loan. Because of the
                              priority of distributions, shortfalls resulting
                              from delinquencies that are not covered by
                              advances will be borne first by the related
                              Subordinate Certificates (in reverse order of
                              payment priority), and then by the related Senior
                              Certificates.

                              Net interest shortfalls will adversely affect the
                              yields on the Offered Certificates. In addition,
                              losses generally will be borne by the related
                              Subordinate Certificates. As a result, the yields
                              on the Offered Certificates will depend on the
                              rate and timing of realized losses on the related
                              Mortgage Loans.

There Are Risks Relating
to Exchangeable REMIC
Certificates and
Exchangeable Certificates.... If you are purchasing any Exchangeable REMIC
                              Certificates or Exchangeable Certificates, you
                              should consider that the characteristics of any
                              Exchangeable Certificates will reflect, in the
                              aggregate, generally the characteristics of the
                              related Exchangeable REMIC Certificates. Investors
                              are encouraged to also consider a number of
                              factors that will limit a certificateholder's
                              ability to exchange Exchangeable REMIC
                              Certificates for Exchangeable Certificates and
                              vice versa:

                              o    At the time of the proposed exchange, a
                                   certificateholder must own Certificates of
                                   the related Class or Classes in the
                                   proportions necessary to make the desired
                                   exchange.

                              o    A certificateholder that does not own the
                                   Certificates may be unable to obtain the
                                   necessary Exchangeable REMIC Certificates or
                                   Exchangeable Certificates because the holders
                                   of the needed Certificates may be unwilling
                                   or unable to sell them or because the
                                   necessary Certificates have been placed into
                                   other financial structures.

                              o    Principal distributions will decrease the
                                   amounts available for exchange over time.


Banc of America Securities LLC                                                29
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

Credit Scores May Not
Accurately Predict the
Likelihood of Default........ The Sponsor generally uses Credit Scores as part
                              of its underwriting process. The attached
                              collateral summary shows credit scores for the
                              mortgagors obtained at the time of origination of
                              their mortgage loans. A credit score purports only
                              to be a measurement of the relative degree of risk
                              a borrower represents to a lender, i.e., that a
                              borrower with a higher score is statistically
                              expected to be less likely to default in payment
                              than a borrower with a lower score. In addition,
                              it should be noted that credit scores were
                              developed to indicate a level of default
                              probability over a two-year period, which does not
                              correspond to the life of most mortgage loans.
                              Furthermore, credit scores were not developed
                              specifically for use in connection with mortgage
                              loans, but for consumer loans in general.
                              Therefore, credit scores do not address particular
                              mortgage loan characteristics that influence the
                              probability of repayment by the borrower. Neither
                              the Depositor nor the Sponsor makes any
                              representations any mortgage loan or that a
                              particular credit score should be relied upon as a
                              basis for an expectation that a borrower will
                              repay its mortgage loan according to its terms.

Geographic Concentration
May Increase Risk of Loss
Due to Adverse Economic
Conditions or Natural
Disasters.................... At various times, certain geographic regions will
                              experience weaker economic conditions and housing
                              markets and, consequently, will experience higher
                              rates of delinquency and loss on mortgage loans
                              generally. In addition, certain states have
                              experienced natural disasters, including
                              earthquakes, fires, floods and hurricanes, which
                              may adversely affect property values. Although
                              mortgaged properties located in certain identified
                              flood zones will be required to be covered, to the
                              maximum extent available, by flood insurance, no
                              mortgaged properties will otherwise be required to
                              be insured against earthquake damage or any other
                              loss not covered by standard hazard insurance
                              policies. Any concentration of mortgaged
                              properties in a state or region may present unique
                              risk considerations. See the tables entitled
                              "Geographic Distribution of Mortgaged Properties
                              of the Mortgage Loans" in the attached collateral
                              summary for a listing of the locations and
                              concentrations of the mortgaged properties.

                              Any deterioration in housing prices in a state or
                              region due to adverse economic conditions, natural
                              disaster or other factors, and any deterioration
                              of economic conditions in a state or region that
                              adversely affects the ability of borrowers to make
                              payments on the mortgage loans, may result in
                              losses on the Mortgage Loans. Any losses may
                              adversely affect the yield to maturity of the
                              related Offered Certificates.


Banc of America Securities LLC                                                30
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

Residential Real Estate
Values May Fluctuate and
Adversely Affect Your
Investment................... There can be no assurance that values of the
                              mortgaged properties have remained or will remain
                              at their levels on the dates of origination of the
                              related Mortgage Loans. The value of any mortgaged
                              property generally will change over time from its
                              value on the appraisal or sales date. If
                              residential real estate values generally or in a
                              particular geographic area decline, the
                              loan-to-value ratios shown in the table in the
                              accompanying collateral annex might not be a
                              reliable indicator of the rates of delinquencies,
                              foreclosures and losses that could occur on the
                              Mortgage Loans. If the residential real estate
                              market should experience an overall decline in
                              property values large enough to cause the
                              outstanding balances of the Mortgage Loans and any
                              secondary financing on the related mortgaged
                              properties to equal or exceed the value of the
                              mortgaged properties, delinquencies, foreclosures
                              and losses could be higher than those now
                              generally experienced in the mortgage lending
                              industry or in the Sponsor's prior securitizations
                              involving the Depositor.

                              In addition, adverse economic conditions and other
                              factors (which may or may not affect real property
                              values) may affect the mortgagors' timely payment
                              of scheduled payments of principal and interest on
                              the Mortgage Loans and, accordingly, the actual
                              rates of delinquencies, foreclosures and losses
                              with respect to the mortgage pool. These other
                              factors could include excessive building resulting
                              in an oversupply of housing in a particular area
                              or a decrease in employment reducing the demand
                              for housing in an area. To the extent that credit
                              enhancements do not cover such losses, your yield
                              may be adversely impacted.

United States Military
Operations May Increase
Risk of Relief Act
Shortfalls................... As a result of military operations in Afghanistan
                              and Iraq, the United States has placed a
                              substantial number of armed forces reservists and
                              members of the National Guard on active duty
                              status. It is possible that the number of
                              reservists and members of the National Guard
                              placed on active duty status may remain at high
                              levels for an extended time. To the extent that a
                              member of the military, or a member of the armed
                              forces reserves or National Guard who is called to
                              active duty, is a mortgagor of a mortgage loan in
                              the trust, the interest rate limitation of the
                              Servicemembers Civil Relief Act, and any
                              comparable state law, will apply. This may result
                              in interest shortfalls on the Mortgage Loans in
                              the trust, which will be borne by all classes of
                              interest bearing Certificates and components.
                              Neither the Sponsor nor the Depositor has taken
                              any action to determine whether any of the
                              Mortgage Loans would be affected by these interest
                              rate limitations.


Banc of America Securities LLC                                                31
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

The Certificates May
Not Receive Amounts
Expected from any Yield
Maintenance Agreements....... The yield maintenance agreement payment for any
                              Distribution Date will be based on the lesser of
                              (x) the Class Balance(s) of the related Class or
                              Classes or (y) the related notional amount, which
                              will decrease for each Distribution Date during
                              the life of the applicable yield maintenance
                              agreement. The notional amounts are generally
                              derived by using an assumed prepayment rate for
                              the applicable mortgage loans. The actual rate of
                              prepayment on the applicable mortgage loans is
                              likely to differ from the rate assumed. If
                              prepayments on these mortgage loans occur at a
                              rate slower than the rate used in determining the
                              notional amounts, the Class Balance(s) of the
                              related Class or Classes will be greater than the
                              related notional amount for a Distribution Date
                              and a holder of the related Certificates will
                              receive less than if the counterparty were
                              required to make payments based on the Class
                              Balance(s) of the related Class or Classes.

There is a Risk that
Interest Payments on the
Mortgage Loans May Be
Insufficient to Pay
Interest on Your
Certificates................. When a Mortgage Loan is prepaid in full, the
                              mortgagor is charged interest only up to the date
                              on which payment is made, rather than for an
                              entire month. When a mortgagor makes a partial
                              principal prepayment on a Mortgage Loan, the
                              mortgagor is not charged interest on the
                              prepayment for the month in which the principal
                              prepayment was received. This may result in a
                              shortfall in interest collections available for
                              payment on the next Distribution Date. The
                              Servicer is required to cover a portion of the
                              shortfall in interest collections that are
                              attributable to prepayments in full and partial
                              prepayments on the Mortgage Loans, but in each
                              case only up to the amount of Compensating
                              Interest related to such Mortgage Loans for such
                              Distribution Date. To the extent these shortfalls
                              are not covered by the amount of related
                              Compensating Interest, they will be allocated pro
                              rata to the related classes of interest-bearing
                              Certificates and any related components.

Certificates May Not Be
Appropriate for Individual
Investors.................... If you are an individual investor who does not
                              have sufficient resources or expertise to evaluate
                              the particular characteristics of a class of
                              Offered Certificates, the Offered Certificates may
                              not be an appropriate investment for you. This may
                              be the case because, among other things:

                              o    if you purchase your Certificates at a price
                                   other than par, your yield to maturity will
                                   be sensitive to the uncertain rate and timing
                                   of principal prepayments on the applicable
                                   Mortgage Loans;


Banc of America Securities LLC                                                32
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

                              o    the rate of principal distributions on, and
                                   the weighted average lives of, the Offered
                                   Certificates will be sensitive to the
                                   uncertain rate and timing of principal
                                   prepayments on the applicable Mortgage Loans
                                   and the priority of principal distributions
                                   among the classes of Certificates, and as
                                   such, the Offered Certificates and, in
                                   particular, any class of special retail
                                   certificates, may be inappropriate
                                   investments for you if you require a
                                   distribution of a particular amount of
                                   principal on a specific date or an otherwise
                                   predictable stream of distributions;

                              o    you may not be able to reinvest amounts
                                   distributed in respect of principal on your
                                   Certificates (which distributions, in
                                   general, are expected to be greater during
                                   periods of relatively low interest rates) at
                                   a rate at least as high as the applicable
                                   pass-through rate or your expected yield;

                              o    a secondary market for the Offered
                                   Certificates may not develop or provide you
                                   with liquidity of investment; and

                              o    you must pay tax on any interest or original
                                   issue discount in the year it accrues, even
                                   if the cash is paid to you in a different
                                   year.

Limited Source of Payments --
No Recourse to Depositor,
Seller, Servicer or Trustee.. Proceeds of the Mortgage Loans (and any insurance
                              policy with respect to a class of insured special
                              retail certificates) will be the sole source of
                              payments on the Certificates. The Certificates do
                              not represent an interest in or obligation of the
                              Depositor, the Servicer, the Sponsor, the Trustee
                              or any of their affiliates. There are, however,
                              limited obligations of the Depositor with respect
                              to certain breaches of representations and
                              warranties, and limited obligations of the
                              Servicer with respect to its servicing
                              obligations.

                              Neither the Certificates nor the Mortgage Loans
                              will be guaranteed by or insured by any
                              governmental agency or instrumentality, the
                              Depositor, the Sponsor, the Servicer, the Trustee
                              or any of their affiliates. Consequently, if
                              payments on the Mortgage Loans are insufficient or
                              otherwise unavailable to make all payments
                              required on the Certificates, there will be no
                              recourse to the Depositor, the Sponsor, the
                              Servicer, the Trustee or any of their affiliates.

Limited Liquidity............ The Underwriter intends to make a market for
                              purchase and sale of the Offered Certificates
                              after their initial issuance, but the Underwriter
                              has no obligation to do so. There is no assurance
                              that such a secondary market will develop or, if
                              it does develop, that it will provide you with
                              liquidity of investment or that it will continue
                              for the life of the Offered Certificates. As a
                              result, you may not be able to sell your
                              Certificates


Banc of America Securities LLC                                                33
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The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
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[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
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                                  Risk Factors
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                              or you may not be able to sell your Certificates
                              at a high enough price to produce your desired
                              return on investment.

                              The secondary market for mortgage-backed
                              securities has experienced periods of illiquidity
                              and can be expected to do so in the future.
                              Illiquidity means that there may not be any
                              purchasers for your class of Certificates.
                              Although any class of Certificates may experience
                              illiquidity, it is more likely that classes of
                              Certificates that are more sensitive to
                              prepayment, credit or interest rate risk (such as
                              the Interest Only, Super Senior Support,
                              Companion, Inverse Floating Rate, Principal Only,
                              or Subordinated Certificates) will experience
                              illiquidity.

Alternative Underwriting
Standards May Increase
Risk of Loss................. Certain of the Mortgage Loans may have been
                              originated using the Sponsor's "Alternative A"
                              underwriting guidelines. See "The Mortgage Loan
                              Programs--Mortgage Loan Underwriting--Bank of
                              America Alternative Underwriting Standards" in the
                              base prospectus. These underwriting guidelines are
                              different from and, in certain respects, less
                              stringent than the general underwriting guidelines
                              employed by the sponsor. For example, certain of
                              the mortgage loans may have been originated with
                              less than standard documentation or with higher
                              maximum loan-to-value ratios. Accordingly, the
                              mortgage loans may experience rates of
                              delinquencies, defaults, foreclosure, bankruptcy
                              and loss that are higher than those experienced by
                              mortgage loans underwritten using the Sponsor's
                              general underwriting standards.

The Rate of Default on
Mortgage Loans that Are
Secured by Investor
Properties May be Higher
than on Other Mortgage
Loans........................ Certain of the Mortgage Loans may be secured by
                              investor properties. An investor property is a
                              property which, at the time of origination, the
                              mortgagor represented would not be used as the
                              mortgagor's primary residence or second home.
                              Because the mortgagor is not living on the
                              property, the mortgagor may be more likely to
                              default on the mortgage loan than on a comparable
                              mortgage loan secured by a primary residence, or
                              to a lesser extent, a second home. In addition,
                              income expected to be generated from an investor
                              property may have been considered for underwriting
                              purposes in addition to the income of the
                              mortgagor from other sources. Should this income
                              not materialize, it is possible the mortgagor
                              would not have sufficient resources to make
                              payments on the mortgage loan.

Mortgage Loans Having an
Interest Only Period May
Have a Higher Risk Of
Default or Rates of
Prepayment................... Certain of the Mortgage Loans may have an initial
                              interest only period after the date of
                              origination. During this interest only period, the


Banc of America Securities LLC                                                34
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

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                                  Risk Factors
- --------------------------------------------------------------------------------

                              payment due from the related mortgagor will be
                              less than that of a traditional mortgage loan. In
                              addition, the principal balance of the mortgage
                              loan will not be reduced (except in the case of
                              prepayments) because there will be no scheduled
                              monthly payments of principal during this period.
                              Accordingly, no principal payments will be
                              distributed to the related Certificates from these
                              Mortgage Loans during their interest only period
                              except in the case of prepayment.

                              After the initial interest only period, payments
                              on a mortgage loan with an interest only period
                              will be recalculated to amortize fully its unpaid
                              principal balance over its remaining life and the
                              mortgagor will be required to make scheduled
                              payments of both principal and interest. The
                              required payment of principal will increase the
                              burden on the mortgagor and may increase the risk
                              of default or prepayment under the related
                              mortgage loan. In underwriting mortgage loans with
                              interest only periods, the Sponsor generally does
                              not consider the ability of mortgagors to make
                              payments of principal at the end of the interest
                              only period. Higher scheduled monthly payments may
                              induce the related mortgagors to refinance their
                              mortgage loans, which would result in higher
                              prepayments. In addition, in default situations
                              losses may be greater on these mortgage loans
                              because they do not amortize during the initial
                              period. These losses will be allocated to the
                              Certificates.

                              The performance of mortgage loans with an interest
                              only period may be significantly different from
                              mortgage loans that amortize from origination. In
                              particular these mortgagors may be more likely to
                              refinance their mortgage loans, which may result
                              in higher prepayment speeds than would otherwise
                              be the case.

There Are Risks Relating
to Mortgaged Properties
Subject to Second Lien
Mortgage Loans............... At the time of origination of certain of the
                              Mortgage Loans, a lender other than the Sponsor
                              may have originated a second lien mortgage loan.
                              Mortgage Loans that have second lien mortgage
                              loans encumbering the same mortgaged property may
                              have higher rates of delinquency and foreclosure
                              relative to mortgage loans that do not have second
                              lien mortgage loans behind them. This may be due
                              to changes in the mortgagor's debt-to-income
                              profile, the fact that mortgagors may then have
                              less equity in the mortgaged property or other
                              factors. You should also note that any mortgagor
                              could obtain a second lien mortgage loan at any
                              time subsequent to the date of origination of
                              their first lien mortgage loan from any lender.

Subordinate Certificates
May Provide Subordination
for All


Banc of America Securities LLC                                                35
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
[Banc of America Securities Logo]
                                   Banc of America Alternative Loan Trust 2007-1
                               Mortgage Pass-Through Certificates, Series 2007-1
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                  Risk Factors
- --------------------------------------------------------------------------------

Groups....................... The Subordinate Certificates may provide credit
                              support for more than one Groups of Senior
                              Certificates and thus the outstanding Class
                              Balances of such Subordinate Certificates could be
                              reduced to zero as a result of a disproportionate
                              amount of principal losses on the Mortgage Loans
                              in one Loan Group. Therefore, these losses on the
                              Mortgage Loans in one Loan Group will reduce the
                              subordination provided by the Subordinate
                              Certificates to the other Groups of Senior
                              Certificates and increase the likelihood that
                              losses may be allocated to the other Groups of
                              Senior Certificates.

                              Under certain circumstances due to a
                              cross-collateralization mechanism, principal
                              otherwise payable to these Subordinate
                              Certificates will be paid to certain Senior
                              Certificates.

High Rates of LIBOR or
Another Index May Result
in a Lower or Negative
Yield on any Inverse
Floating Rate Interest
Only Certificates............ If you are purchasing any inverse floating rate
                              interest only certificates, in addition to the
                              risk that a rapid rate of prepayments on the
                              related Mortgage Loans may result in a lower
                              actual yield than you expected or a negative
                              yield, you should also consider the risk that high
                              rates of LIBOR or high rates of another applicable
                              index for your certificates may result in the
                              failure to recover your initial investment.


                      Categories of Classes of Certificates

      The Certificates of any series may be comprised of one or more classes.
The classes, in general, fall into different categories. The chart in the base
prospectus under the heading "Description of the Certificates--Categories of
Classes of Certificates" identifies and generally defines certain of the more
typical categories. The prospectus supplement for a series of Certificates may
identify the classes which comprise that series by reference to those categories
or another category specified in the prospectus supplement.


Banc of America Securities LLC                                                36
- --------------------------------------------------------------------------------
The depositor has filed a registration statement (including a prospectus) with
the SEC for the offering to which this communication relates. Before you invest,
you should read the prospectus in that registration statement and other
documents the depositor has filed with the SEC for more complete information
about the depositor and this offering. You may get these documents for free by
visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor,
any underwriter or any dealer participating in the offering will arrange to send
you the prospectus if you request it by calling toll-free 1-800-294-1322 or you
e-mail a request to dg.prospectus_distribution@bofasecurities.com. The
securities may not be suitable for all investors. Banc of America Securities LLC
and its affiliates may acquire, hold or sell positions in these securities, or
in related derivatives, and may have an investment or commercial banking
relationship with the depositor.

The information contained in these materials may be based on assumptions
regarding market conditions and other matters as reflected herein. Banc of
America Securities LLC (the "Underwriter") makes no representation regarding the
reasonableness of such assumptions or the likelihood that any such assumptions
will coincide with actual market conditions or events, and these materials
should not be relied upon for such purposes. The Underwriter and its affiliates,
officers, directors, partners and employees, including persons involved in the
preparation or issuance of these materials, may, from time to time, have long or
short positions in, and buy and sell, the securities mentioned herein or
derivatives thereof (including options). Information in these materials is
current as of the date appearing on the material only. Information in these
materials regarding any securities discussed herein supersedes all prior
information regarding such securities. These materials are not to be construed
as an offer to sell or the solicitation of any offer to buy any security in any
jurisdiction where such an offer or solicitation would be illegal.
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